WO2023050393A1

WO2023050393A1 - Method for determining random access response window, and apparatus for said method

Info

Publication number: WO2023050393A1
Application number: PCT/CN2021/122387
Authority: WO
Inventors: 朱亚军
Original assignee: 北京小米移动软件有限公司
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-04-06
Also published as: CN116210332A

Abstract

Disclosed in the embodiments of the present application are a method for determining a random access response window, and an apparatus for said method, which may be applied to communication systems such as a long term evolution (LTE) system, a 5th generation (5G) mobile communication system, a 5G new radio (NR) system, or other new mobile communication systems in the future. The method comprises: acquiring the number of repeated transmissions of a narrowband physical random access channel (NPRACH); acquiring a round-trip time (RTT) between a first device and a second device; and determining an opening position of a random access response window. By means of implementing the embodiments of the present application, an opening position of a random access response window can be determined according to the number of repeated transmissions of an NPRACH and an RTT. As such, an unnecessary additional delay can be avoided, thereby facilitating a reduction in detection overheads, and preventing resource wastage.

Description

A method and device for determining a random access response window

technical field

The present application relates to the field of communication technologies, and in particular to a method and device for determining a random access response window.

Background technique

Satellite communication is considered to be an important aspect of future wireless communication technology development. Satellite communication refers to the communication carried out by radio communication equipment on the ground using satellites as relays. The satellite communication system consists of a satellite part and a ground part. The characteristics of satellite communication are: the communication range is large; as long as it is within the range covered by the radio waves emitted by the satellite, communication can be carried out from any two points; it is not easily affected by land disasters (high reliability).

In satellite communication, due to the long signal transmission distance between terminal equipment and network equipment, data transmission takes a long time. For transmissions that have an uplink and downlink relationship, the transmission delay is compensated by introducing a timing offset Koffset. Determine the accurate random access response window RA Response window, but the delay requirements of transmission requirements in different scenarios are different, which may cause unnecessary additional delay, increase detection overhead, and cause waste of resources.

Contents of the invention

Embodiments of the present application provide a method and device for determining a random access response window, which can be applied to a long term evolution (long term evolution, LTE) system, a fifth generation (5th generation, 5G) mobile communication system, and a 5G new air interface ( new radio (NR) system, or other future new mobile communication systems and other communication systems, the number of repeated transmissions and round-trip time (Round-Trip Time, RTT) through the narrowband Physical Random Access Channel (Narrowband Physical Random Access Channel, NPRACH) Determining the opening position of the random access response window can avoid unnecessary additional time delay, thereby helping to reduce detection overhead and avoid resource waste.

In the first aspect, the embodiment of the present application provides a method for determining a random access response window, the method including:

Obtain the number of repeated transmissions of the narrowband physical random access channel NPRACH;

Obtain the round-trip time RTT between the first device and the second device;

Determine the opening position of the random access response window.

By implementing the embodiment of the present application, the open position of the random access response window can be determined by the number of repeated transmissions of the NPRACH and the RTT. In this way, unnecessary additional time delay can be avoided, thereby helping to reduce the detection overhead , to avoid wasting resources.

Optionally, the determining the opening position of the random access response window includes:

An open position of a random access response window is determined according to the RTT, wherein the number of repeated transmissions of the NPRACH is smaller than a preset threshold.

Get default value;

An open position of a random access response window is determined according to the RTT and the preset value, wherein the number of repeated transmissions of the NPRACH is greater than or equal to the preset threshold.

Optionally, the opening position of the random access response window is: subframe n+RTT, where n is an integer.

Optionally, the opening position of the random access response window is: subframe n+max{RTT, preset value}, where n is an integer.

By implementing the embodiment of the present application, the open position of the random access response window can be determined by the number of repeated transmissions of the NPRACH, the preset value, and the RTT. In this way, unnecessary additional time delay can be avoided, thereby effectively It is beneficial to reduce detection overhead and avoid waste of resources.

Optionally, the last subframe containing the repeated transmission of the NPRACH is subframe n.

Optionally, the first device is a terminal device, and the second device is a network device.

Optionally, the first device is a network device, and the second device is a terminal device.

In the second aspect, the embodiment of this application provides a communication device, which has part or all of the functions of the terminal device in the method described in the first aspect above, for example, the communication device may have part or all of the functions in this application The functions in the embodiments may also have the functions of independently implementing any one of the embodiments in the present application. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In an implementation manner, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform corresponding functions in the foregoing method. The transceiver module is used to support communication between the communication device and other equipment. The communication device may further include a storage module, which is used to be coupled with the transceiver module and the processing module, and stores necessary computer programs and data of the communication device.

As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory. In an implementation manner, the communication device includes:

A transceiver module, configured to obtain the number of repeated transmissions of the narrowband physical random access channel NPRACH;

The transceiver module is further configured to obtain a round-trip time RTT between the apparatus and the second device;

A processing module, configured to determine the opening position of the random access response window.

Optionally, the processing module is further configured to determine an opening position of a random access response window according to the RTT, wherein the number of repeated transmissions of the NPRACH is less than a preset threshold.

Optionally, the processing module is also used for:

Get default value;

Optionally, the open position of the random access response window is: subframe n+RTT, where n is an integer.

Optionally, the device is a terminal device, and the second device is a network device.

Optionally, the device is a network device, and the second device is a terminal device.

In a fourth aspect, the embodiment of the present application provides a communication device, the communication device includes a processor and a memory, the memory stores a computer program; the processor executes the computer program stored in the memory, so that the communication device performs The method described in the first aspect above.

In the fifth aspect, the embodiment of the present application provides a communication device, the device includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to make the The device executes the method described in the first aspect above.

In the sixth aspect, the embodiment of the present application provides a system for determining a random access response window, the system includes the communication device described in the second aspect, or the system includes the communication device described in the third aspect, or the system It includes the communication device described in the fourth aspect, or the system includes the communication device described in the fifth aspect.

In the seventh aspect, the embodiment of the present invention provides a computer-readable storage medium, which is used to store instructions used by the above-mentioned terminal equipment, and when the instructions are executed, the terminal equipment executes the method described in the above-mentioned first aspect .

In an eighth aspect, the present application further provides a computer program product including a computer program, which, when run on a computer, causes the computer to execute the method described in the first aspect above.

In the ninth aspect, the present application provides a chip system, the chip system includes at least one processor and an interface, used to support the terminal device to implement the functions involved in the first aspect, for example, determine or process the data and at least one of the information. In a possible design, the chip system further includes a memory, and the memory is configured to store necessary computer programs and data of the terminal device. The system-on-a-chip may consist of chips, or may include chips and other discrete devices.

In a tenth aspect, the present application provides a computer program that, when run on a computer, causes the computer to execute the method described in the first aspect above.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiment of the present application or the background art, the following will describe the drawings that need to be used in the embodiment of the present application or the background art.

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a base station side uplink and downlink timing alignment provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of misalignment of uplink and downlink timing on the base station side provided by an embodiment of the present application;

FIG. 4 is a schematic flowchart of a method for determining a random access response window provided in an embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for determining a random access response window provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a chip provided by an embodiment of the present application.

Detailed ways

For ease of understanding, terms involved in this application are firstly introduced.

1. Non-terrestrial Network (NTN)

Compared with the traditional terrestrial network, NTN adopts typical technologies such as satellite satellites and high-altitude platforms (High-Altitude Platformstation, HAPS) to participate in network deployment. Taking satellite communication as an example, in theory, only three Geostationary Earth Orbiting (GEO) satellites are needed to cover the global scope except the polar regions, and a larger coverage area can be achieved at a lower cost.

2. Physical Random Access Channel (PRACH)

The PRACH is a channel for a terminal device to initiate uplink system access, and the terminal device will initiate a random access process on the PRACH channel independently or based on the instruction of the base station eNodeB.

In order to better understand a method for determining a random access response window disclosed in the embodiment of the present application, the communication system to which the embodiment of the present application applies is firstly described below.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application. The communication system may include, but is not limited to, a network device and a terminal device. The number and form of the devices shown in Figure 1 are for example only and do not constitute a limitation to the embodiment of the application. In practical applications, two or more network equipment, two or more terminal equipment. The communication system shown in FIG. 1 includes one network device 101 and one terminal device 102 as an example.

It should be noted that the technical solutions of the embodiments of the present application may be applied to various communication systems. For example: long term evolution (LTE) system, fifth generation (5th generation, 5G) mobile communication system, 5G new radio (new radio, NR) system, or other future new mobile communication systems, etc. It should also be noted that the side link in this embodiment of the present application may also be referred to as a side link or a through link.

The network device 101 in this embodiment of the present application is an entity of a network for transmitting or receiving signals. For example, the network device 101 may be an evolved base station (evolved NodeB, eNB), a transmission point (transmission reception point, TRP), a next generation base station (next generation NodeB, gNB) in an NR system, or a base station in other future mobile communication systems Or an access node in a wireless fidelity (wireless fidelity, WiFi) system, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device. The network device provided by the embodiment of the present application may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit), using CU-DU The structure of the network device, such as the protocol layer of the base station, can be separated, and the functions of some protocol layers are placed in the centralized control of the CU, and the remaining part or all of the functions of the protocol layer are distributed in the DU, and the CU centrally controls the DU.

The terminal device 102 in the embodiment of the present application is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal equipment may also be called terminal equipment (terminal), user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal equipment (mobile terminal, MT) and so on. The terminal device can be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality ( augmented reality (AR) terminal equipment, wireless terminal equipment in industrial control (industrial control), wireless terminal equipment in self-driving (self-driving), wireless terminal equipment in remote medical surgery (remote medical surgery), smart grid ( Wireless terminal devices in smart grid, wireless terminal devices in transportation safety, wireless terminal devices in smart city, wireless terminal devices in smart home, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

The continuous emergence of new Internet applications such as the new generation of augmented reality (Augmented Reality, AR), virtual reality (Virtual Reality, VR), and vehicle-to-vehicle communication has put forward higher requirements for wireless communication technology, driving the continuous evolution of wireless communication technology and meet the needs of the application. At present, cellular mobile communication technology is in the evolution stage of a new generation of technology. An important feature of the new generation technology is to support flexible configuration of various business types. Because different service types have different requirements for wireless communication technologies, for example, the main requirements of Enhanced Mobile Broadband (eMBB) service types focus on large bandwidth and high speed; The main requirements of the Latency Communication (URLLC) business type focus on high reliability and low delay; the main requirements of the large-scale machine type communication (Massive Machine Type Communication, mMTC) business type focus on the large number of connections. Therefore, a new generation of wireless communication systems needs a flexible and configurable design to support the transmission of various business types.

In the research of wireless communication technology, satellite communication is considered to be an important aspect in the development of future wireless communication technology. Satellite communication refers to the communication carried out by radio communication equipment on the ground using satellites as relays. The satellite communication system consists of a satellite part and a ground part. The characteristics of satellite communication are: the communication range is large; as long as it is within the range covered by the radio waves emitted by the satellite, communication can be carried out from any two points; it is not easily affected by land disasters (high reliability). As a supplement to the current ground cellular communication system, satellite communication can have the following benefits:

(1) Extended coverage: For areas where the current cellular communication system cannot cover or has high coverage costs, such as oceans, deserts, and remote mountainous areas, satellite communications can be used to solve communication problems.

(2) Emergency communication: Under the condition that the basic infrastructure of cellular communication is unavailable due to disasters such as earthquakes, satellite communication can be used to quickly establish a communication connection.

(3) Provide industry applications: For example, for delay-sensitive services of long-distance transmission, the delay of service transmission can be reduced by means of satellite communication.

It is foreseeable that in the future wireless communication system, the satellite communication system and the cellular communication system on land will gradually realize deep integration and truly realize the intelligent connection of all things.

For the satellite communication scenario, due to the long signal transmission distance between the sending end and the receiving end, data transmission takes a long time. For transmissions that have an uplink-downlink relationship, the current standardization discussion has determined the introduction of a Koffset parameter to compensate for transmission delay.

Figure 2 is a schematic diagram of a base station side uplink and downlink timing alignment provided by an embodiment of the present application. As shown in Figure 4, eNBDL is the base station side downlink communication, eNBUL is the base station side uplink communication, UEDL is the terminal side downlink communication, and UEUL is the terminal side uplink communication, n is a reference subframe. The reference point is located in the base station. In order to make the reference point n in eNBDL and the reference point in eNBUL be in the same subframe, the terminal equipment needs to detect signals in advance, even if the reference point in UEUL is advanced, and Delay in the figure is the transmission delay, that is The time it takes for a signal to propagate in the terminal equipment and base station. Let n in the UEUL be earlier than n in the UEUL by an amount of TA=2×Delay, where TA is a timing advance (Timing Advance, TA). That is, the reference subframe n in the eNBDL is aligned with the reference subframe n in the eNBUL.

Fig. 3 is a schematic diagram of misalignment of uplink and downlink timing on the base station side provided by an embodiment of the present application. As shown in Figure 5, eNBDL refers to downlink communication on the base station side, eNBUL refers to uplink communication on the base station side, UEDL refers to downlink communication on the terminal side, UEUL refers to uplink communication on the terminal side, and n is a reference point. The reference point is not located in the base station. In order to make the reference point n in eNBDL and the reference point in eNBUL be in the same subframe, the terminal equipment needs to detect signals in advance, even if the reference point in UEUL is advanced, Delay in the figure is the transmission delay. That is, the time it takes for the signal to propagate in the terminal equipment and the base station. Making n in the UEUL earlier than n in the UEUL by an amount of one TA. That is, make the reference point n in eNBDL and the reference point in eNBUL be in the same subframe.

The Koffset can be applied in various operations, such as: DCI-scheduled PUSCH transmission; HARQ feedback information transmission and MAC CE transmission, etc. For some uplink and downlink operations, delay compensation can also be performed through the round-trip time (Round-Trip Time, RTT) between the terminal device and the network device UE-eNB to compensate the propagation delay from the terminal to the base station.

In the satellite communication scenario, the range of the timing relationship used in different scenarios may be different, depending on the orbit information of the satellite and the position information of the reference point. Timing relationships may be in the range [0ms,560ms].

For NB-IoT terminals, when the terminal sends the NPRACH sequence, the terminal opens the random response receiving window RA Response window to determine the time position as follows:

If the number of repeated transmissions of NPRACH is greater than or equal to 64, then the starting position of the RA Response window is from the last subframe n+UE-eNB RTT+41ms containing the repeated transmission of the preamble preamble;

If the number of repeated transmissions of NPRACH is less than 64, the starting position of the RA Response window is from the last subframe n+UE-eNB RTT+4ms containing the repeated transmission of the preamble preamble;.

For NB-IoT devices supported in NTN scenarios, if UE-eNB RTT is used to determine the start position of RA Response window, in some scenarios, it will cause unnecessary additional delay increase

It can be understood that the communication system described in the embodiment of the present application is to illustrate the technical solution of the embodiment of the present application more clearly, and does not constitute a limitation to the technical solution provided in the embodiment of the present application. With the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The method and device for determining the random access response window provided by this application will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 4 . FIG. 4 is a schematic flowchart of a method for determining a random access response window provided by an embodiment of the present application. Can be applied to terminal equipment. As shown in Figure 4, the method may include but not limited to the following steps:

Step S401: Obtain the number of repeated transmissions of the narrowband physical random access channel NPRACH.

In the embodiment of the present application, the terminal device has a Global Navigation Satellite System (Global Navigation Satellite System, GNSS) positioning capability, and can determine the position of the satellite through the ephemeris. When the terminal device sends the NPRACH, it can automatically estimate the time advance amount TA, and perform pre-compensation in advance to determine the opening position of the RA Response window, specifically to determine the opening of the random response receiving window RA Response window according to the number of repeated transmissions of the NPRACH Location. In order to extend the coverage of the signal, the NPRACH channel can obtain coverage enhancement through repeated propagation, and the number of repetitions can be {1, 2, 4, 8, 16, 32, 64, 128}. In a possible embodiment, NPRACH takes 64 radio frames as a cycle, and transmits in subframe 0 on the radio frame with mod 64=0, and the same content is transmitted in subframe 0 in the next 7 consecutive radio frames. The NPRACH cannot occupy the first three OFDM symbols of the 0th subframe for repeated transmission. The method for obtaining the opening position of the random access response window may be determined according to the number of repeated transmissions of the NPRACH, and the corresponding determination method is different when the number of repeated transmissions is greater than a preset threshold and when the number of repeated transmissions is greater than a preset threshold.

Step S402: Obtain the round-trip time RTT between the first device and the second device.

In the embodiment of the present application, as described in the background, the NTN has the advantages of wide coverage and simple networking. However, limited by the large orbital height (35786km), the satellite signal propagation delay is large, and the real-time service experience is poor. In order to compensate for the transmission delay, it is also necessary to determine the opening position of the RA Response window according to the transmission time of the satellite signal between the first device and the second device, that is, RTT. In a possible embodiment, the first device is a terminal device, and the second device is a network device. In another possible embodiment, the first device is a network device, and the second device is a terminal device.

Step S403: Determine the opening position of the random access response window.

In the embodiment of the present application, after the number of repeated transmissions of the NPRACH and the RTT are obtained, the opening position of the random access response window can be determined.

In the embodiment of the present application, in order to expand the coverage of the signal, the NPRACH channel can obtain coverage enhancement through repeated propagation, and the number of repetitions can be {1, 2, 4, 8, 16, 32, 64, 128}. The preset threshold is set to obtain a method for determining the open position of the random access response window according to the repeated transmission times of the NPRACH. If the number of repeated transmissions of the NPRACH is less than the preset threshold, the opening position of the random access response window may be determined according to the RTT. In a possible embodiment, the preset threshold is 64, and when the number of repeated transmissions of the NPRACH is less than 64, the opening position of the random access response window can be determined according to the RTT.

Please refer to FIG. 5 . FIG. 5 is a schematic flowchart of a method for determining a random access response window provided in an embodiment of the present application. Can be applied to network equipment. As shown in Figure 5, the method may include but not limited to the following steps:

Step S501: Obtain a preset value.

In the embodiment of the present application, the preset value is used to adjust the opening position of the random access response window, the preset value is a fixed time deviation, and the random access window can be determined more accurately according to the preset value. The opening position of the access response window. In a possible embodiment, the preset value is 41 milliseconds (ms).

Step S502: Determine the opening position of the random access response window according to the RTT and the preset value, wherein the number of repeated transmissions of the NPRACH is greater than or equal to the preset threshold.

In the embodiment of the present application, in order to expand the coverage of the signal, the NPRACH channel can obtain coverage enhancement through repeated propagation, and the number of repetitions can be {1, 2, 4, 8, 16, 32, 64, 128}. The preset threshold is set to obtain a method for determining the open position of the random access response window according to the repeated transmission times of the NPRACH. If the number of repeated transmissions of the NPRACH is greater than or equal to the preset threshold, the opening position of the random access response window may be determined according to the RTT and the preset value. In a possible embodiment, the preset threshold is 64, and when the number of repeated transmissions of the NPRACH is greater than or equal to 64, the opening position of the random access response window can be determined according to the RTT and the preset value .

In this embodiment of the present application, if the number of repeated transmissions of the NPRACH is less than a preset threshold, the opening position of the random access response window needs to be determined according to the RTT. In a possible embodiment, the preset threshold is 64, the number of repeated transmissions of the NPRACH is 32, the RTT is 200ms, and the last subframe containing the repeated transmission of the NPRACH is subframe number 7, Then the open position of the random access response window is subframe 7+200ms.

In this embodiment of the present application, if the number of repeated transmissions of the NPRACH is greater than or equal to a preset threshold, it is necessary to compare the RTT with the preset value to determine the opening position of the random access response window. In a possible embodiment, the preset threshold is 64, the number of repeated transmissions of the NPRACH is 128, the RTT is 200ms, the preset value is 41ms, and the last subframe containing the repeated transmission of the NPRACH If the subframe number is 6, then the open position of the random access response window is subframe 6+200ms.

In another possible embodiment, the preset threshold is 64, the number of repeated transmissions of the NPRACH is 128, the RTT is 33ms, the preset value is 41ms, and the last subsection containing the repeated transmission of the NPRACH If the frame is subframe number 6, then the open position of the random access response window is subframe 6+41ms.

In the embodiment of the present application, in order to expand the coverage of the signal, the NPRACH channel can obtain coverage enhancement through repeated propagation, and the number of repetitions can be {1, 2, 4, 8, 16, 32, 64, 128}. In a possible embodiment, the number of the last subframe containing the repeated transmission of the NPRACH is 7, and then n=7.

In this embodiment of the present application, if the first device is a terminal device, then the second device is a network device; if the first device is a network device, then the second device is a terminal device.

In the above-mentioned embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspectives of the network device and the terminal device respectively. In order to realize the various functions in the method provided by the above embodiments of the present application, the network device and the terminal device may include a hardware structure and a software module, and realize the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. A certain function among the above-mentioned functions may be implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module.

Please refer to FIG. 6 , which is a schematic structural diagram of a communication device 60 provided in an embodiment of the present application. The communication device 60 shown in FIG. 6 may include a transceiver module 601 and a processing module 602 . The transceiver module 601 may include a sending module and/or a receiving module, the sending module is used to realize the sending function, the receiving module is used to realize the receiving function, and the sending and receiving module 601 can realize the sending function and/or the receiving function.

The communication device 60 may be a terminal device (such as the terminal device in the foregoing method embodiments), may also be a device in the terminal device, and may also be a device that can be matched with the terminal device. Alternatively, the communication device 60 may be a network device, or a device in the network device, or a device that can be matched with the network device.

The communication device 60 is a terminal device, including:

Optionally, the processing module is also used for:

Get default value;

An open position of a random access response window is determined according to the RTT and the preset value, where the number of repeated transmissions of the NPRACH is greater than or equal to the preset threshold.

Please refer to FIG. 7 . FIG. 7 is a schematic structural diagram of another communication device 70 provided in an embodiment of the present application. The communication device 70 may be a network device, or a terminal device (such as the terminal device in the foregoing method embodiments), or a chip, a chip system, or a processor that supports the network device to implement the above method, or it may also be a support terminal A device is a chip, a chip system, or a processor that implements the above method. The device can be used to implement the methods described in the above method embodiments, and for details, refer to the descriptions in the above method embodiments.

Communications device 70 may include one or more processors 701 . The processor 701 may be a general-purpose processor or a special-purpose processor or the like. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.) and execute computer programs , to process data for computer programs.

Optionally, the communication device 70 may further include one or more memories 702, on which a computer program 703 may be stored, and the processor 701 executes the computer program 703, so that the communication device 70 executes the method described in the foregoing method embodiments. method. Optionally, data may also be stored in the memory 702 . The communication device 70 and the memory 702 can be set separately or integrated together.

Optionally, the communication device 70 may further include a transceiver 704 and an antenna 705 . The transceiver 704 may be called a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function. The transceiver 704 may include a receiver and a transmitter, and the receiver may be called a receiver or a receiving circuit for realizing a receiving function; the transmitter may be called a transmitter or a sending circuit for realizing a sending function.

Optionally, the communication device 70 may further include one or more interface circuits 706 . The interface circuit 706 is used to receive code instructions and transmit them to the processor 701 . The processor 701 executes the code instructions to enable the communication device 70 to execute the methods described in the foregoing method embodiments.

The communication device 70 is a terminal device (such as the terminal device in the foregoing method embodiments): the processor 701 is configured to execute step S403 in FIG. 4 . The transceiver 704 is used to execute steps S401 and S402 in FIG. 4 .

The communication device 70 is a network device: the processor 701 is configured to execute step S403 in FIG. 4 . The transceiver 704 is used to execute steps S401 and S402 in FIG. 4 .

In an implementation manner, the processor 701 may include a transceiver for implementing receiving and sending functions. For example, the transceiver may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together. The above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transmission.

In an implementation manner, the processor 701 may store a computer program 703 , and the computer program 703 runs on the processor 701 to enable the communication device 70 to execute the methods described in the foregoing method embodiments. The computer program 703 may be solidified in the processor 701, and in this case, the processor 701 may be implemented by hardware.

In an implementation manner, the communication device 70 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in this application can be implemented in integrated circuits (integrated circuits, ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board, PCB), electronic equipment, etc. The processor and transceiver can also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication device described in the above embodiments may be a network device or a terminal device (such as the terminal device in the aforementioned method embodiments), but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be affected by Figure 7 Limitations. A communication device may be a stand-alone device or may be part of a larger device. For example the communication device may be:

(1) Stand-alone integrated circuits ICs, or chips, or chip systems or subsystems;

(2) A set of one or more ICs, optionally, the set of ICs may also include storage components for storing data and computer programs;

(3) ASIC, such as modem (Modem);

(4) Modules that can be embedded in other devices;

(5) Receivers, terminal equipment, intelligent terminal equipment, cellular phones, wireless equipment, handsets, mobile units, vehicle equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.;

(6) Others and so on.

For the case where the communication device may be a chip or a chip system, refer to the schematic structural diagram of the chip shown in FIG. 8 . The chip shown in FIG. 8 includes a processor 801 and an interface 802 . Wherein, the number of processors 801 may be one or more, and the number of interfaces 802 may be more than one.

Optionally, the chip further includes a memory 803 for storing necessary computer programs and data.

Those skilled in the art can also understand that various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functions are implemented by hardware or software depends on the specific application and overall system design requirements. Those skilled in the art may use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the protection scope of the embodiments of the present application.

The embodiment of the present application also provides a system for determining a random access response window, the system includes a communication device as a terminal device (such as the terminal device in the foregoing method embodiment) and a communication device as a network device in the aforementioned embodiment of Figure 6 Alternatively, the system includes a communication device serving as a terminal device (such as the terminal device in the foregoing method embodiment) and a communication device serving as a network device in the foregoing embodiment in FIG. 7 .

The present application also provides a readable storage medium on which instructions are stored, and when the instructions are executed by a computer, the functions of any one of the above method embodiments are realized.

The present application also provides a computer program product, which implements the functions of any one of the above method embodiments when executed by a computer.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer programs. When the computer program is loaded and executed on the computer, all or part of the processes or functions according to the embodiments of the present application will be generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer program can be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program can be downloaded from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) etc.

Those of ordinary skill in the art can understand that: the first, second and other numbers involved in this application are only for convenience of description, and are not used to limit the scope of the embodiments of this application, and also indicate the sequence.

At least one in this application can also be described as one or more, and multiple can be two, three, four or more, and this application does not make a limitation. In this embodiment of the application, for a technical feature, the technical feature is distinguished by "first", "second", "third", "A", "B", "C" and "D", etc. The technical features described in the "first", "second", "third", "A", "B", "C" and "D" have no sequence or order of magnitude among the technical features described.

The corresponding relationships shown in the tables in this application can be configured or predefined. The values of the information in each table are just examples, and may be configured as other values, which are not limited in this application. When configuring the corresponding relationship between the information and each parameter, it is not necessarily required to configure all the corresponding relationships shown in the tables. For example, in the table in this application, the corresponding relationship shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above table, for example, splitting, merging, and so on. The names of the parameters shown in the titles of the above tables may also adopt other names understandable by the communication device, and the values or representations of the parameters may also be other values or representations understandable by the communication device. When the above tables are implemented, other data structures can also be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables can be used wait.

Predefined in this application can be understood as defining, predefining, storing, prestoring, prenegotiating, preconfiguring, curing, or prefiring.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A method for determining a random access response window, characterized in that the method comprises:

Obtain the number of repeated transmissions of the narrowband physical random access channel NPRACH;

Obtain the round-trip time RTT between the first device and the second device;

Determine the opening position of the random access response window.
The method according to claim 1, wherein said determining the opening position of the random access response window comprises:

An open position of a random access response window is determined according to the RTT, wherein the number of repeated transmissions of the NPRACH is smaller than a preset threshold.
The method according to claim 1, wherein said determining the opening position of the random access response window comprises:

Get default value;

An open position of a random access response window is determined according to the RTT and the preset value, wherein the number of repeated transmissions of the NPRACH is greater than or equal to the preset threshold.
The method according to claim 2, wherein the open position of the random access response window is: subframe n+RTT, where n is an integer.
The method according to claim 3, wherein the opening position of the random access response window is: subframe n+max{RTT, preset value}, where n is an integer.
The method according to claim 4 or 5, characterized in that the last subframe containing the repeated transmission of the NPRACH is subframe n.
The method according to any one of claims 1-6, wherein the first device is a terminal device, and the second device is a network device.
The method according to any one of claims 1-6, wherein the first device is a network device, and the second device is a terminal device.
A communication device, characterized by comprising:

A transceiver module, configured to obtain the number of repeated transmissions of the narrowband physical random access channel NPRACH;

The transceiver module is further configured to obtain a round-trip time RTT between the apparatus and the second device;

A processing module, configured to determine the opening position of the random access response window.
The device according to claim 9, characterized in that,

The processing module is further configured to determine an open position of a random access response window according to the RTT, wherein the number of repeated transmissions of the NPRACH is less than a preset threshold.
The device according to claim 9, wherein the processing module is also used for:

Get default value;

An open position of a random access response window is determined according to the RTT and the preset value, wherein the number of repeated transmissions of the NPRACH is greater than or equal to the preset threshold.
The device according to claim 10, wherein the open position of the random access response window is: subframe n+RTT, where n is an integer.
The device according to claim 11, wherein the opening position of the random access response window is: subframe n+max{RTT, preset value}, where n is an integer.
The device according to claim 12 or 13, wherein the last subframe including the repeated transmission of the NPRACH is subframe n.
The device according to any one of claims 9-14, wherein the device is a terminal device, and the second device is a network device.
The device according to any one of claims 9-14, wherein the device is a network device, and the second device is a terminal device.
A communication device, characterized in that the device includes a processor and a memory, and a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device performs the The method described in any one of 1-8.
A communication device, characterized by comprising: a processor and an interface circuit;

The interface circuit is used to receive code instructions and transmit them to the processor;

The processor is configured to run the code instructions to execute the method according to any one of claims 1-8.
A computer-readable storage medium is used for storing instructions, and when the instructions are executed, the method according to any one of claims 1-8 is implemented.